Originally Posted by GroceryStore_Ninja
Just a correction on that twist rate sti1911 the very first m16's were a 1:14 which would yaw at the slightest interference to the bullet(I E leaves in the jungle) with the 1:12 twist the m193 bullet will yaw after 2-3 inches of penetration, as opposed to the m855 and the 1:7 which yaws after 14-17 inches on an unarmored target. there are some interesting new loads out there but nothing has actually hit the battle fields in mass quantities save maybe the USMC barrier round.
With M855 it actually depends on the lot and rifle whether or not you get early yaw or late yaw. That's why most Soldiers and Marines have not problems but there are many reports of the round failing to drop bad guys.
Also I have talked with several people who are currently overseas or just returned from Afghanistan and the Army is in fact widely using the new A1. My old unit is there now and I stay in touch with a few of the guys. They are reporting that its more accurate than M855 and they haven't had anyone complain about lack of lethality. My only concern with the round is the increase in chamber pressure that the new A1 produces.